摘要:
A communication network for providing communication between multiple sources and multiple destinations includes a source selector (34; 70, 72; 90, 98) having a plurality of input terminals (22) for connection to respective sources (30), at least one output terminal (20; 100), and crosspoint elements (38; 80, 82; 92, 98) for connecting any selected set of the input terminals to the output terminal. A destination selector (18; 100) has at least one input terminal (20) connected to the output terminal of the source selector, a plurality of output terminals (24) for connection to respective destinations (30), and crosspoint elements (28; 102) for connecting the input terminal of the destination selector to any selected set of the output terminals of the destination selector.
摘要:
An input/output switching apparatus which can construct the system more flexibly as compared with the conventional system. The input/output switching apparatus is configured so that a user can manage the connection state of a physically-existing switching unit as the connection state of a virtual switching unit which corresponds to the physically-existing switching unit. Thus, the user can control the physical switching unit merely by operating the virtual switching unit which is constructed so as to be convenient for operation.
摘要:
In a broadband signal switching equipment having crosspoint matrix using FET technology devices crosspoint-associated storage memory cells that control switching elements are each formed with two cross-coupled n-MOS inverter circuits each of which has its input side connected via a selection transistor to a selection line that carries a non-inverted and an inverted selection signal of one selection direction, respectively. Both selection transistors receive on their control electrodes the selection signal of the other selection direction. The control electrodes of two load transistors of the two cross-coupled n-channel inverter circuits are connected to the selection line that carries the inverted selection clock signal of the other selection direction. An additional driver transistor of the same channel type as two driver transistors in the two cross-coupled n-channel inverter circuits is inserted between the two drive transistors of the two cross-coupled n-channel inverter circuits and ground or a feed potential terminal. The control electrode of this additional driver transistor is connected to the selection line that carries the inverted selection clock signal of the other selection direction.
摘要:
A deterministic routing method for switch matrices. The routed matrix receives N input signals and produces M output signals on M output columns. The method of the present invention has three steps. First, each of the M output columns in the switch matrix is searched for each of N separate input signals. Secondly, each of the N inputs is assigned to its located column. If all of the N inputs cannot be assigned to one of the M columns, the set of inputs is shifted and the steps are repeated until all of the N inputs are routed.
摘要:
In a broadband signal switching network with a switching point matrix constructed in FET technology, an input driver circuit is connected for feeding a respective matrix input line, which driver circuit is blocked via an inhibit input when a prescribed signal level is reached on the respective matrix input line which guarantees a safe switch through of the switching element connected with the matrix input line, whereby a further recharging of the matrix input line is prevented.
摘要:
A switch system and method transfer a data packet from a source data port to one or more destination data ports through a switch. The system comprises a source input buffer, a first and a second source input path, a first and a second output path and at least one crosspoint circuit. The source input buffer includes a first and a second data section. The first and the second data sections are coupled to the first and the second input paths respectively. The first and the second input paths couple through the crosspoint circuits at each intersection with the first and the second output paths. The method includes loading the data packets into data sections of an input buffer, transferring each data packet across an input path dedicated for each data section, transmitting each data packet over its input path, and switching the data from the input path to the output path based on a voltage differential. A crosspoint circuit in the switch system includes a first and a second reduced voltage swing line, a first and a second transistor circuit for each data input path and a sense amplifier for a data port. The first reduced voltage swing line is coupled to the first transistor circuit, the second reduced voltage swing line is coupled to the second transistor circuit and both reduced voltage swing lines are connected to the sense amplifier. The method of the unit comprises the steps of charging a first and a second reduced voltage swing line to a predetermined voltage, discharging the voltage from the first reduced voltage swing line, maintaining the voltage in the second voltage line, receiving a clock signal at the sense amplifier, and generating an output signal based on a voltage differential between the voltage lines.
摘要:
A field programmable gate array in which the pattern of a first smaller switch matrix is continued into a number of other smaller reduced switch matrices necessary to provide full coverage for all of the input conductor combinations at the output conductors.
摘要:
An EPROM-based crossbar switch is disclosed that provides for the programmable interconnection of logic circuitry. Circuit layout and design features reduce circuit real estate and bitline parasitic capacitances, allowing a high level of integration and faster switching speeds.
摘要:
A switch system and method transfer a data packet from a source data port to one or more destination data ports through a switch. The system includes at least one crosspoint circuit. A crosspoint circuit in the switch system includes a first and a second reduced voltage swing line, a first and a second transistor circuit for each data input path and a sense amplifier for a data port. The first reduced voltage swing line is coupled to the first transistor circuit, the second reduced voltage swing line is coupled to the second transistor circuit and both reduced voltage swing lines are connected to the sense amplifier. A method for transferring data using a crosspoint circuit includes a charging first voltage line and a second voltage line to a predetermined voltage level, discharging the predetermined voltage level in the first voltage line, maintaining the predetermined voltage level in the second voltage line concurrently with the discharging step, receiving a high clock signal at a sense amplifier, and generating an output signal based on a differential voltage level at the arrival of the clock signal.